Wood-planing machine.



W. N. SAWYER.

WOOD PLANING MACHINE.

APPLICATION nuzo nzc.a. um.

1,3027 1 7. Patented May 6, 1919.

25 fnaentor UNITED STATES {PATENT oFFIoE.

WILLARD N. SAWYER, OF.WINCHENDON, MASSACHUSETTS, ASSIGNOR TO WILLIAMITI.

WHITNEY, 0F WINGHENDON, MASSACHUSETTS.

wooD-rLAnIne MACHINE.

Specification of Letters Patent.

Patented May 6, 1919.

Application filed December 3, 1917. Serial No. 205,039.

ToaZZ whom it may concern:

Be it known that I, VVILLARD N. SAWYER, a citizen of the United States,residing in "Winchendon, county of lVorcester, and State ofMassachusetts, have invented an Improvement in WVoodPlaning Machines, ofwhich the following descriptioinin connection with the accompanyindrawings,is a specification, like characters on the draw ingsrepresenting like parts.

The invention hereinafter described relates to Wood planing machines andthe like. It is customary to provide machines of this character withsets of rolls for feeding the work through the machine past a cutter.One roll of a set should be pressed yieldingly toward its companion rollin order that the rolls may conform to work of varying thickness andexert suflicient pressure thereon to grip and feed the same through themachine. I

It is necessary to adjust the journal boxes of the lower rolls from timeto time to vary the elevation of said rolls and their relation to theupper rolls; and it is also desirable to vary the tension of the-springswhich act on the rolls in order to vary the pressure thereof on thework. Heretofore, these adjustments have been diflicult to make, owingto the inaccessibility of theadjusting parts.

The present invention, among other objects, aims to provide a simple,readily accessible means whereby the aforesaid adjusgments may beconveniently and easily ma e.

ing description of one good form of the invention shown in theaccompanying drawing, wherein Figure 1 is a side elevation of a portionof a wood planing machine having rolls pro vided with devices embodyingthe invention; and

Fig. 2 on an enlarged scale is a view showing said devices in verticalsection.

Referring to the drawing, the machine shown therein comprises a frame 1having the usual rotary cutter 3 mounted thereon and a bridge 5 opposedthereto for guiding and holding the work down to said cutter. To feedthe work past the cutter, a set of upper and lower in-feed rolls 7 and 9and a set of upper and lower out-feed rolls 11 and 13 are provided.

Roll controlling devices embodying the lnvention are shown herein asapplied to the ends of the lower out-feed roll. Since the devices forboth ends of the roll are similar, a description of one will suflice forboth.

Referring more particularly to Fig. 2, the lower out-feed roll 13 isprovided with a shaft 15 having an end journaled in a bearing box 17adapted to slide vertically in a guideway 19 in the machine frame.

To support the box a vertical post 23 is provided projecting through anopening in the machine frame and having its lower end portion 25threaded ina bore in said frame. A portion 27 of this post intermediateits ends may be slabbed off to receive a wrench which may convenientlybe presented to said post through said opening. The post may be securedin different positions of vertical adjustment by a lock nut 29 adaptedto bear on an edge of the frame above said bore.

A collar 31 loose on said post may be adjusted up or down by anadjusting nut 33 secured by alock nut 35.

, To yieldingly support the bearing box, a coil spring 3'? is providedencircling said post and confined between said lower collar 31 and anupper collar 39 upon which the box rests.

To limit upward movement of said box, by said spring, suitable stopmeans may be provided, in the present instance of the invention, in theform of an internal flange 41 on said collar adapted to engage the underv edge of a head &3 on said post. The character'of the 'invent1onmay bebest understood by reference to the follow- There is, however a spacebetween the top of' said head and the bottom of said box sufficient topermit the box to move downward somewhat against the resistance of saidspring when work is passing between the rolls.

The tension of the spring may be readily increased without changing theelevation of the bearing box. To accomplish this the collar 31 is movedupward by the adjusting nut 83;

The head of the supporting post cooperates desirably with the uppercollar to limit expansion of the spring. It will be noted that the topof the head is spaced from the top of the upper collar when the latteris pressed to its limit by the spring. As a. result, when the box ispressed downward, it can contract the sprmg until the box is limited byits engagement with the head of the post. If the post should be ad]ustedsothat the top ofits head is beneath the bottom of the guideway' for thebox, the downward movement of the box-willbe limited-by its engagementwith the top of said head.

It will be noted that the screwand'nut' for controlling the elevation ofthe journal to a" scraperor other tool for treating the Work.

It will be understood that the inventionis not limited to thevspecificembodiment shownherein, but that extensive deviations-may be made,therefrom without departing from the spirit and scope of the appendedclaims;

What is claimed is: V 1. In a machine of the character described, thecombination with a frame, of a cutter mounted thereon, means for feedingwork relatively to the cutter including upper and lower feed rolls,shafts for saidrolls, bearing boxes for the shaft for the lower roll,

guides on said frame for said boxes, andsupporting means for saidiboxes,each including a spring, means=toadJustsaidsupport to vary the elevationofthe boxyand means to vary the tension of said spring without varyingthe elevation of said box; 2. In a machine of the character described,

' the combination witlrupper and lower rolls,

of a bearing box for the lower roll, and means yieldingly to supportsaid box comprising a post, a member movable on said post and servingas'a rest for the box, a coil springon said post to yieldingly supportsaid movable member, and means to vary the tension of said springwithout varying the elevation of said box.

3' Ina=machine offtlie'cliaracter described; the-combinationwitli unnerand lower rolls, of bearingboxes for the lower roll, anddevicesy'ieldi'n'gly to support said boxes, each comprising a post, astop on said post, upper and lowercollars, one slidable and the'otheradj ustableto different fixed positions on said post spring meansconfined between said collars and tending. to urge the upper collartoward said stop, and means bodily to vary the elevation of said postandthe parts carried thereby without disturbing the tension of I saidspring means.-

4.111 a-machine'of the character described, the combination withan'upright frame-haw ing an open'ingtherein, ofa guide on said frameabove said-opening, a. bearing box slidable in said guide, a postextending across. said opening 7 toward said box and having. meansustably securing. its lower end on said frame at the bottom of saidopening," a pair of members on said post, one being. movable andsupporting the box andthe other having. means for adjusting the same todifferent-fixed positions, and a coil-spring confined between saidmembers to yieldingly sustain the movable member, accessto both of saidadjusting means being had through said opening.

Inamachineofthe-character described, the combination of' upper and lowerfeed rolls, ofbearing boxes for saidrolls, and devices yielding-1y tosustain said boxes, each comprising. a supportingmember, a springthereon, adjustable-means to vary the elevation .ofsaid supportingmember, and adj ustable means to varythe tension of said spring withoutva-rying'the elevation of saidsupporting-,member;

In testimony whereof; I have signed my name to thisspecification.

VILLA-RD N. SAWYER.

Copies of this patent mayv be obtainecrmr five'cents each, byaddressing-111': Commissioner ot-ilatentl.

Washington, D. 0!

